<template>
	<div class="tui-chat" :class="[!isPC ? 'tui-chat-h5' : '']">
		<div class="tui-chat-main">
			<div class="tui-chat-safe-tips">
				<span>
					{{
            TUITranslateService.t(
              "TUIChat.【安全提示】本 APP 仅用于体验腾讯云即时通信 IM 产品功能，不可用于业务洽谈与拓展。请勿轻信汇款、中奖等涉及钱款的信息，勿轻易拨打陌生电话，谨防上当受骗。"
            )
          }}
				</span>
				<a @click="openComplaintLink(Link.complaint)">{{
          TUITranslateService.t("TUIChat.点此投诉")
        }}</a>
			</div>
			<MessageGroupApplication v-if="isGroup" :key="props.groupID" :groupID="props.groupID" />
			<scroll-view id="messageScrollList" class="tui-message-list" scroll-y="true" :scroll-top="scrollTop"
				:scroll-into-view="`tui-${historyFirstMessageID}`" @scroll="handelScrollListScroll">
				<p v-if="!isCompleted" class="message-more" @click="getHistoryMessageList">
					{{ TUITranslateService.t("TUIChat.查看更多") }}
				</p>
				<li v-for="(item, index) in messageList" :id="`tui-${item.ID}`" :key="item.vueForRenderKey"
					:class="'message-li ' + item.flow">
					<MessageTimestamp :currTime="item.time" :prevTime="index > 0 ? messageList[index - 1].time : 0" />
					<div class="message-item" @click.stop="toggleID = ''">
						<MessageTip v-if="item.type === TYPES.MSG_GRP_TIP ||
                isCreateGroupCustomMessage(item)
              " :content="item.getMessageContent()" />
						<div v-else-if="!item.isRevoked && !isPluginMessage(item)" :id="`msg-bubble-${item.ID}`"
							class="message-bubble-container"
							@longpress="handleToggleMessageItem($event, item, index, true)"
							@touchstart="handleH5LongPress($event, item, index, 'touchstart')"
							@touchend="handleH5LongPress($event, item, index, 'touchend')"
							@mouseover="handleH5LongPress($event, item, index, 'touchend')">
							<MessageBubble :messageItem="item" :content="item.getMessageContent()"
								:blinkMessageIDList="blinkMessageIDList" @resendMessage="resendMessage(item)"
								@blinkMessage="blinkMessage" @scrollTo="scrollTo"
								@setReadReceiptPanelVisible="setReadReceiptPanelVisible">
								<MessageText v-if="item.type === TYPES.MSG_TEXT" :content="item.getMessageContent()" />
								<ProgressMessage v-if="item.type === TYPES.MSG_IMAGE"
									:content="item.getMessageContent()" :messageItem="item">
									<MessageImage :content="item.getMessageContent()" :messageItem="item"
										@previewImage="handleImagePreview(index)" />
								</ProgressMessage>
								<ProgressMessage v-if="item.type === TYPES.MSG_VIDEO"
									:content="item.getMessageContent()" :messageItem="item">
									<MessageVideo :content="item.getMessageContent()" :messageItem="item" />
								</ProgressMessage>
								<MessageAudio v-if="item.type === TYPES.MSG_AUDIO" :content="item.getMessageContent()"
									:messageItem="item" :broadcastNewAudioSrc="broadcastNewAudioSrc"
									@getGlobalAudioContext="getGlobalAudioContext" />
								<MessageFile v-if="item.type === TYPES.MSG_FILE" :content="item.getMessageContent()" />
								<MessageFace v-if="item.type === TYPES.MSG_FACE" :content="item.getMessageContent()"
									:isPC="isPC" />
								<MessageLocation v-if="item.type === TYPES.MSG_LOCATION"
									:content="item.getMessageContent()" />
								<MessageCustom v-if="item.type === TYPES.MSG_CUSTOM" :content="item.getMessageContent()"
									:messageItem="item" />
							</MessageBubble>
						</div>
						<MessagePlugin v-else-if="!item.isRevoked && isPluginMessage(item)" :message="item"
							@resendMessage="resendMessage" @handleToggleMessageItem="handleToggleMessageItem"
							@handleH5LongPress="handleH5LongPress" />
						<MessageRevoked v-else :isEdit="item.type === TYPES.MSG_TEXT" :messageItem="item"
							@messageEdit="handleEdit(item)" />
						<MessageTool v-if="item.ID === toggleID" :class="[
                'message-tool',
                item.flow === 'out' ? 'message-tool-out' : 'message-tool-in',
              ]" :messageItem="item" />
					</div>
				</li>
			</scroll-view>
			<!-- 滚动按钮 -->
			<ScrollButton ref="scrollButtonInstanceRef" @scrollToLatestMessage="scrollToLatestMessage" />
			<Dialog v-if="reSendDialogShow" :show="reSendDialogShow" :isH5="!isPC" :center="true" :isHeaderShow="isPC"
				@submit="resendMessageConfirm()" @update:show="(e) => (reSendDialogShow = e)">
				<p class="delDialog-title">
					{{ TUITranslateService.t("TUIChat.确认重发该消息？") }}
				</p>
			</Dialog>
			<!-- 已读回执用户列表面板 -->
			<ReadReceiptPanel v-if="isShowReadUserStatusPanel" :message="Object.assign({}, readStatusMessage)"
				@setReadReceiptPanelVisible="setReadReceiptPanelVisible" />
		</div>
	</div>
</template>

<script lang="ts" setup>
	import {
		ref,
		nextTick,
		onMounted,
		onUnmounted,
		getCurrentInstance,
	} from '../../../adapter-vue';
	import TUIChatEngine, {
		IMessageModel,
		TUIStore,
		StoreName,
		TUITranslateService,
		TUIChatService,
	} from '@tencentcloud/chat-uikit-engine';
	import throttle from 'lodash/throttle';
	import {
		setInstanceMapping,
		getBoundingClientRect,
		getScrollInfo,
	} from '@tencentcloud/universal-api';
	import Link from './link';
	import MessageGroupApplication from './message-group-application/index.vue';
	import MessageText from './message-elements/message-text.vue';
	import ProgressMessage from '../../common/ProgressMessage/index.vue';
	import MessageImage from './message-elements/message-image.vue';
	import MessageAudio from './message-elements/message-audio.vue';
	import MessageFile from './message-elements/message-file.vue';
	import MessageFace from './message-elements/message-face.vue';
	import MessageCustom from './message-elements/message-custom.vue';
	import MessageTip from './message-elements/message-tip.vue';
	import MessageBubble from './message-elements/message-bubble.vue';
	import MessageLocation from './message-elements/message-location.vue';
	import MessageTimestamp from './message-elements/message-timestamp.vue';
	import MessageVideo from './message-elements/message-video.vue';
	import MessageTool from './message-tool/index.vue';
	import MessageRevoked from './message-tool/message-revoked.vue';
	import MessagePlugin from '../../../plugins/plugin-components/message-plugin.vue';
	import ReadReceiptPanel from './read-receipt-panel/index.vue';
	import ScrollButton from './scroll-button/index.vue';
	import { isPluginMessage } from '../../../plugins/plugin-components/index';
	import Dialog from '../../common/Dialog/index.vue';
	import { Toast, TOAST_TYPE } from '../../common/Toast/index';
	import { isCreateGroupCustomMessage } from '../utils/utils';
	import { isEnabledMessageReadReceiptGlobal } from '../utils/utils';
	import { isPC, isH5 } from '../../../utils/env';
	import { IAudioContext } from '../../../interface';

	const props = defineProps({
		groupID: {
			type: String,
			default: '',
		},
		isGroup: {
			type: Boolean,
			default: false,
		},
	});

	let observer : any = null;
	let groupType : string | undefined;
	const sentReceiptMessageID = new Set<string>();
	const thisInstance = getCurrentInstance()?.proxy || getCurrentInstance();
	const messageList = ref<IMessageModel[]>();
	const isCompleted = ref(false);
	const currentConversationID = ref('');
	const toggleID = ref('');
	const scrollTop = ref(5000); // 首次是 15 条消息，最大消息高度为300
	const TYPES = ref(TUIChatEngine.TYPES);
	const isLoadingMessage = ref(false);
	const isLongpressing = ref(false);
	const blinkMessageIDList = ref<string[]>([]);
	const messageTarget = ref<IMessageModel>();
	const scrollButtonInstanceRef = ref<InstanceType<typeof ScrollButton>>();
	const historyFirstMessageID = ref<string>('');
	let selfAddValue = 0;

	// audio control
	const broadcastNewAudioSrc = ref<string>('');

	// 阅读回执状态message
	const readStatusMessage = ref<IMessageModel>();
	const isShowReadUserStatusPanel = ref<boolean>(false);

	// 消息重发 Dialog
	const reSendDialogShow = ref(false);
	const resendMessageData = ref();
	const emits = defineEmits(['handleEditor']);

	// 消息滑动到底部，建议搭配 nextTick 使用
	const scrollToBottom = () => {
		// 文本消息高度：60, 最大消息高度 280
		scrollTop.value += 300;
		// 解决 uniapp 打包到 app 首次进入滑动到底部，300 可设置
		const timer = setTimeout(() => {
			scrollTop.value += 1;
			clearTimeout(timer);
		}, 300);
	};

	// 监听回调函数
	const onCurrentConversationIDUpdated = (conversationID : string) => {
		currentConversationID.value = conversationID;

		// 开启已读回执的状态 群聊缓存群类型
		if (isEnabledMessageReadReceiptGlobal()) {
			const { groupProfile }
				= TUIStore.getConversationModel(conversationID) || {};
			groupType = groupProfile?.type;
		}
	};

	onMounted(() => {
		// 消息列表监听
		TUIStore.watch(StoreName.CHAT, {
			messageList: onMessageListUpdated,
			messageSource: onMessageSourceUpdated,
			isCompleted: onChatCompletedUpdated,
		});

		TUIStore.watch(StoreName.CONV, {
			currentConversationID: onCurrentConversationIDUpdated,
		});

		setInstanceMapping('messageList', thisInstance);
	});

	// 取消监听
	onUnmounted(() => {
		TUIStore.unwatch(StoreName.CHAT, {
			messageList: onMessageListUpdated,
			isCompleted: onChatCompletedUpdated,
		});

		TUIStore.unwatch(StoreName.CONV, {
			currentConversationID: onCurrentConversationIDUpdated,
		});

		observer?.disconnect();
		observer = null;
	});

	const handelScrollListScroll = throttle(
		function (e : Event) {
			scrollButtonInstanceRef.value?.judgeScrollOverOneScreen(e);
		},
		500,
		{ leading: true },
	);

	function getGlobalAudioContext(
		audioMap : Map<string, IAudioContext>,
		options ?: { newAudioSrc : string },
	) {
		if (options?.newAudioSrc) {
			broadcastNewAudioSrc.value = options.newAudioSrc;
		}
	}

	async function onMessageListUpdated(list : IMessageModel[]) {
		observer?.disconnect();
		messageList.value = list
			.filter(message => !message.isDeleted)
			.map((message) => {
				message.vueForRenderKey = `${message.ID}`;
				return message;
			});
		const newLastMessage = messageList.value?.[messageList.value?.length - 1];
		if (messageTarget.value) {
			// scroll to target message
			scrollAndBlinkMessage(messageTarget.value);
		} else if (!isLoadingMessage.value && !(scrollButtonInstanceRef.value?.isScrollButtonVisible && newLastMessage?.flow === 'in')) {
			// scroll to bottom
			nextTick(() => {
				scrollToBottom();
			});
		}
		if (isEnabledMessageReadReceiptGlobal()) {
			nextTick(() => bindIntersectionObserver());
		}
	}

	// 滚动到最新消息
	async function scrollToLatestMessage() {
		try {
			const { scrollHeight } = await getScrollInfo(
				'#messageScrollList',
				'messageList',
			);
			if (scrollHeight) {
				scrollTop.value === scrollHeight
					? (scrollTop.value = scrollHeight + 1)
					: (scrollTop.value = scrollHeight);
			} else {
				scrollToBottom();
			}
		} catch (error) {
			scrollToBottom();
		}
	}

	async function onMessageSourceUpdated(message : IMessageModel) {
		messageTarget.value = message;
		scrollAndBlinkMessage(messageTarget.value);
	}

	function scrollAndBlinkMessage(message : IMessageModel) {
		if (
			messageList.value?.some(
				messageListItem => messageListItem?.ID === message?.ID,
			)
		) {
			nextTick(async () => {
				await scrollToTargetMessage(message);
				await blinkMessage(message?.ID);
				messageTarget.value = undefined;
			});
		}
	}

	function onChatCompletedUpdated(flag : boolean) {
		isCompleted.value = flag;
	}

	// 获取历史消息
	const getHistoryMessageList = () => {
		isLoadingMessage.value = true;
		const currentFirstMessageID = messageList.value?.[0]?.ID || '';
		TUIChatService.getMessageList().then(() => {
			nextTick(() => {
				historyFirstMessageID.value = currentFirstMessageID;
				const timer = setTimeout(() => {
					historyFirstMessageID.value = '';
					isLoadingMessage.value = false;
					clearTimeout(timer);
				}, 500);
			});
		});
	};

	// todo: webview 跳转
	const openComplaintLink = () => { };

	// 消息操作
	const handleToggleMessageItem = (
		e : any,
		message : IMessageModel,
		index : number,
		isLongpress = false,
	) => {
		if (isLongpress) {
			isLongpressing.value = true;
		}
		toggleID.value = message.ID;
	};

	// h5 long press
	let timer : number;
	const handleH5LongPress = (
		e : any,
		message : IMessageModel,
		index : number,
		type : string,
	) => {
		if (!isH5) return;
		function longPressHandler() {
			clearTimeout(timer);
			handleToggleMessageItem(e, message, index, true);
		}
		function touchStartHandler() {
			timer = setTimeout(longPressHandler, 500);
		}
		function touchEndHandler() {
			clearTimeout(timer);
		}
		switch (type) {
			case 'touchstart':
				touchStartHandler();
				break;
			case 'touchend':
				touchEndHandler();
				setTimeout(() => {
					isLongpressing.value = false;
				}, 200);
				break;
		}
	};

	// 消息撤回后，编辑消息
	const handleEdit = (message : IMessageModel) => {
		emits('handleEditor', message, 'reedit');
	};

	// 重发消息
	const resendMessage = (message : IMessageModel) => {
		reSendDialogShow.value = true;
		resendMessageData.value = message;
	};

	// 图片预览
	// 开启图片预览
	const handleImagePreview = (index : number) => {
		if (!messageList.value) {
			return;
		}
		const imageMessageIndex : number[] = [];
		const imageMessageList : IMessageModel[] = messageList.value.filter((item, index) => {
			if (
				!item.isRevoked
				&& !item.hasRiskContent
				&& item.type === TYPES.value.MSG_IMAGE
			) {
				imageMessageIndex.push(index);
				return true;
			}
			return false;
		});
		uni.previewImage({
			current: imageMessageIndex.indexOf(index),
			urls: imageMessageList.map(message => message.payload.imageInfoArray?.[2].url),
			// #ifdef APP-PLUS
			indicator: 'number',
			// #endif
		});
	};

	const resendMessageConfirm = () => {
		reSendDialogShow.value = !reSendDialogShow.value;
		const messageModel = resendMessageData.value;
		console.log(messageModel);
		messageModel.resendMessage();
	};

	function blinkMessage(messageID : string) : Promise<void> {
		return new Promise((resolve) => {
			const index = blinkMessageIDList.value.indexOf(messageID);
			if (index < 0) {
				blinkMessageIDList.value.push(messageID);
				const timer = setTimeout(() => {
					blinkMessageIDList.value.splice(
						blinkMessageIDList.value.indexOf(messageID),
						1,
					);
					clearTimeout(timer);
					resolve();
				}, 3000);
			}
		});
	}

	function scrollTo(scrollHeight : number) {
		scrollTop.value = scrollHeight;
	}

	async function bindIntersectionObserver() {
		if (!messageList.value || messageList.value.length === 0) {
			return;
		}

		if (
			groupType === TYPES.value.GRP_AVCHATROOM
			|| groupType === TYPES.value.GRP_COMMUNITY
		) {
			// 直播群以及社群不进行消息的已读回执监听
			return;
		}

		observer?.disconnect();
		observer = uni
			.createIntersectionObserver(thisInstance, {
				threshold: [0.7],
				observeAll: true,
				// uni 下会把 safetip 也算进去 需要负 margin 来排除
			})
			.relativeTo('#messageScrollList', { top: -70 });

		observer?.observe('.message-li.in .message-bubble-container', (res : any) => {
			if (sentReceiptMessageID.has(res.id)) {
				return;
			}
			const matchingMessage = messageList.value.find((message : IMessageModel) => {
				return res.id.indexOf(message.ID) > -1;
			});
			if (
				matchingMessage
				&& matchingMessage.needReadReceipt
				&& matchingMessage.flow === 'in'
				&& !matchingMessage.readReceiptInfo?.isPeerRead
			) {
				TUIChatService.sendMessageReadReceipt([matchingMessage]);
				sentReceiptMessageID.add(res.id);
			}
		});
	}

	function setReadReceiptPanelVisible(visible : boolean, message ?: IMessageModel) {
		if (!visible) {
			readStatusMessage.value = undefined;
		} else {
			readStatusMessage.value = message;
		}
		isShowReadUserStatusPanel.value = visible;
	}

	async function scrollToTargetMessage(message : IMessageModel) {
		const targetMessageID = message.ID;
		const isTargetMessageInScreen
			= messageList.value
			&& messageList.value.some(msg => msg.ID === targetMessageID);
		if (targetMessageID && isTargetMessageInScreen) {
			const timer = setTimeout(async () => {
				try {
					const scrollViewRect = await getBoundingClientRect(
						'#messageScrollList',
						'messageList',
					);
					const originalMessageRect = await getBoundingClientRect(
						'#tui-' + targetMessageID,
						'messageList',
					);
					const { scrollTop } = await getScrollInfo(
						'#messageScrollList',
						'messageList',
					);
					const finalScrollTop
						= originalMessageRect.top
						+ scrollTop
						- scrollViewRect.top
						- (selfAddValue++ % 2);
					scrollTo(finalScrollTop);
					clearTimeout(timer);
				} catch (error) {
					// todo
				}
			}, 500);
		} else {
			Toast({
				message: TUITranslateService.t('TUIChat.无法定位到原消息'),
				type: TOAST_TYPE.WARNING,
			});
		}
	}
</script>
<style lang="scss" scoped src="./style/index.scss"></style>